Data recovery for coherent attached processor proxy

Patent metadata

Field	Value
Publication number	US-8938587-B2
Application number	US-201313739525-A
Country	US
Kind code	B2
Filing date	Jan 11, 2013
Priority date	Jan 11, 2013
Publication date	Jan 20, 2015
Grant date	Jan 20, 2015

Abstract

A coherent attached processor proxy (CAPP) that participates in coherence communication in a primary coherent system on behalf of an attached processor external to the primary coherent system tracks delivery of data to destinations in the primary coherent system via one or more entries in a data structure. Each of the one or more entries specifies with a destination tag a destination in the primary coherent system to which data is to be delivered from the attached processor. In response to initiation of recovery operations for the CAPP, the CAPP performs data recovery operations, including transmitting, to at least one destination indicated by the destination tag of one or more entries, an indication of a data error in data to be delivered to that destination from the attached processor.

First claim

What is claimed is:

1. A coherent attached processor proxy (CAPP), comprising:
transport logic having a first interface configured to support communication with a system fabric of a primary coherent system and a second interface configured to support communication with an attached processor (AP) including a cache memory that holds copies of memory blocks belonging to a coherent address space of the primary coherent system;
snooper logic that services snooped memory access reques…

Assignees

• IBM

Inventors

• Blaner Bartholomew
• Lauricella Kenneth A
• Mcdonald Joseph G
• Siegel Michael S
• Stuecheli Jeff A

Classifications

• G06F12/0831

  Physics · mapped topic

• G06F12/082 Primary

  Physics · mapped topic

• G06F12/0815 Primary

  Physics · mapped topic